Аннотация:Numerical calculations of the optical energy gap and the optical gains of TE and TM polarization modes in p-AlxGa1-xAs/GaAs0.84P0.16/n-AlxGa1-xAs laser diode structure are carried out for uniaxial compression up to P = 10 kbar along in-plane and normal to a heterostructure directions at temperature interval 77 K – 300 K. The optical energy gap shift under compression is substantially anisotropic and does not change significantly between 77 K and 300 K. The ratio of the optical gains of TM and TE polarization modes is also almost insensitive to the temperature but demonstrates several times decrease under in-plane compression and no change under compression normal to a heterostructure.